Finite element formulation for the electromagnetic analysis of a metallic wedge arbitrarily loaded and shaped near the edge

A hybrid finite element/boundary element method is presented for near and far field scattering by a perfectly conducting wedge, arbitrarily shaped and loaded near the edge illuminated either by a line source at a finite distance or by a plane wave. The solution is applicable when analysing a thick dielectric corrugated screen, corrugated curved edge, non-uniform loaded wedge and small cylindrical lenses fed by a parallel plate waveguide. Numerical results are presented for both TE_z and TM_z polarisations and then they are satisfactorily checked against both analytical and numerical results